steel structures design to eurocode

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BRITISH STANDARD BS EN1993-1-12:2007

Eurocode 3 Design ofsteel structures

Part 1-12: Additional rules for theextension of EN 1993 up to steel gradesS 700

ICS 91.010.30; 91.080.10

Incorporatingcorrigendum

April 2009


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National foreword

This British Standard is the UK implementation ofEN 1993-1-12:2007, incorporating corrigendum April 2009.

The start and finish of text introduced or altered by corrigendum isindicated in the text by tags. Text altered by CEN corrigendum April2009 is indicated in the text by .

The UK participation in its preparation was entrusted by TechnicalCommittee B/525, Building and civil engineering structures, toSubcommittee B/525/31, Structural use of steel.

A list of organizations represented on this subcommittee can beobtained on request to its secretary.

This publication does not purport to include all the necessaryprovisions of a contract. Users are responsible for its correctapplication.

Compliance with a British Standard cannot confer immunityfrom legal obligations.

BS EN 1993-1-12:2007

This British Standard waspublished under the authorityof the Standards Policy andStrategy Committeeon 31 May 2007

BSI 2010

Amendments/corrigenda issued since publication

Date Comments

30 April 2010 Implementation of CEN corrigendum April 2009

ISBN 978 0 580 67794 6


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EUROPEAN STANDARD

NORME EUROPENNE

EUROPISCHE NORM

EN 1993-1-12

February 2007

ICS 91.010.30; 91.080.10

English Version

Eurocode 3 - Design of steel structures - Part 1-12: Additionalrules for the extension of EN 1993 up to steel grades S 700

Eurocode 3 - Calcul des structures en acier - Partie 1-12 :Rgles additionnelles pour l'utilisation de l'EN 1993 jusqu'

la nuance d'acier S 700

Eurocode 3: Bemessung und Konstruktion von Stahlbauten- Teil 1-12: Zustzliche Regeln zur Erweiterung von EN

1993 auf Stahlsorten bis S 700

This European Standard was approved by CEN on 6 July 2006.

CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this EuropeanStandard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such nationalstandards may be obtained on application to the CEN Management Centre or to any CEN member.

This European Standard exists in three official versions (English, French, German). A version in any other language made by translationunder the responsibility of a CEN member into its own language and notified to the CEN Management Centre has the same status as theofficial versions.

CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Cyprus, Czech Republic, Denmark, Estonia, Finland,France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal,Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom.

EUROPEAN COMMITTEE FOR STANDARDIZATIONC O M I T E U R O P E N D E N O R M A L I S A T I O NEUR OPISC HES KOMITEE FR NOR MUNG

Management Centre: rue de Stassart, 36 B-1050 Brussels

2007 CEN All rights of exploitation in any form and by any means reservedworldwide for CEN national Members.

Ref. No. EN 1993-1-12:2007: E

Incorporating corrigendum April 2009


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Contents Page

Foreword......................................................................................................................................................3

1 General .............................................................................................................................................. 3

1.1 Scope ........................................................................................................................................31.2 Normative references ...............................................................................................................41.3 Symbols.................................................................................................................................... 4

2 Additional rules to EN 1993-1-1 to EN 1993-1-11.......................................................................... 5

2.1 Additional rules to EN 1993-1-1 ..............................................................................................52.2 Additional rules to EN 1993-1-2 ..............................................................................................62.3 Additional rules to EN 1993-1-3 ..............................................................................................62.4 Additional rules to EN 1993-1-4 ..............................................................................................62.5 Additional rules to EN 1993-1-5 ..............................................................................................72.6 Additional rules to EN 1993-1-6 ..............................................................................................7

2.7 Additional rules to EN 1993-1-7 ..............................................................................................72.8 Additional rules to EN 1993-1-8 ..............................................................................................72.9 Additional rules to EN 1993-1-9 ..............................................................................................82.10 Additional rules to EN 1993-1-10 ............................................................................................ 82.11 Additional rules to EN 1993-1-11 ............................................................................................ 9

3 Additional rules to application parts EN 1993-2 to EN 1993-6 ....................................................9

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Foreword

This European Standard EN 1993-1-12, Eurocode 3: Design of steel structures: Part 1-12: Additionalrules for the extension of EN 1993 up to steel grades S 700, has been prepared by Technical CommitteeCEN/TC250 Structural Eurocodes , the Secretariat of which is held by BSI. CEN/TC250 is responsiblefor all Structural Eurocodes.

This European Standard shall be given the status of a National Standard, either by publication of anidentical text or by endorsement, at the latest by August 2007, and conflicting National Standards shall bewithdrawn at latest by March 2010.

According to the CEN-CENELEC Internal Regulations, the National Standard Organizations of thefollowing countries are bound to implement this European Standard: Austria, Belgium, Bulgaria, Cyprus,Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy,Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia,Slovenia, Spain, Sweden, Switzerland and United Kingdom.

National annex for EN 1993-1-12

This standard gives alternative procedures, values and recommendations with notes indicating wherenational choices may have to be made. Therefore the National Standard implementing EN 1993-1-12should have a National annex containing all Nationally Determined Parameters to be used for the designof steel structures to be constructed in the relevant country.

National choice is allowed in EN 1993-1-12 through:

2.1(3.1(2))

2.1 (3.2.2(1))

2.1(5.4.3(1))

2.1(6.2.3(2))

2.8(4.2(2))

3(1)

1 General1.1 Scope

(1) This EN 1993-1-12 gives rules that can be used in conjunction with parts

- EN1993-1-1

- EN 1993-1-2

- EN 1993-1-3

- EN 1993-1-4

- EN 1993-1-5

- EN 1993-1-6

- EN 1993-1-7

- EN 1993-1-8

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- EN 1993-1-9

- EN 1993-1-10

- EN 1993-1-11

- EN 1993-2- EN 1993-3-1

- EN 1993-3-2

- EN 1993-4-1

- EN 1993-4-2

- EN 1993-4-3

- EN 1993-5

- EN 1993-6

to enable steel structures to be designed with steel of grades greater than S460 up to S700.

(2) Where it is necessary to alter a rule in other parts to enable up to S700 to be used, it is stated whatneeds to be done, either by noting that a rule is not to be used with steel grades greater than S460, thengiving the one that is required, or by giving an additional rule or rules.

1.2 Normative references

(1) This European Standard incorporates, by dated or undated reference, provisions from otherpublications. These normative references are cited at the appropriate places in the text and thepublications are listed hereafter. For dated references, subsequent amendments to or revisions of any of

these publications apply to this European Standard only when incorporated in it by amendment orrevision. For undated references the latest edition of the publication referred to applies.

EN 499 Welding consumables Covered electrodes for manual metal arc welding of non alloy and finegrain steels Classification

EN 10025-6 Hot rolled products of structural steels - Part 6: Technical delivery conditions for flatproducts of high yield strength structural steels in the quenched and tempered condition

EN 10149-1 Hot-rolled flat products made of high yield strength steels for cold forming Part 1:General delivery conditions

EN 10149-2 Hot-rolled flat products made of high yield strength steels for cold forming Part 2:Delivery conditions for thermomechanically rolled steels

EN 12534 Welding consumables Wire electrodes, wires, rods and deposits for gas shielded metal arcwelding of high strength steels Classification

EN 12535 Welding consumables Tubular cored electrodes for gas shielded metal arc welding of highstrength steels Classification

1.3 Symbols

(1) Symbols used in this standard are defined in the standards referred to.

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2 Additional rules to EN 1993-1-1 to EN 1993-1-11

2.1 Additional rules to EN 1993-1-1

3.1(2) Additional note:NOTE The National Annex may specify steel grades greater than S460 up to S700 for general use or foruse in specific applications. The grades in Tables 1 and 2 and the nominal values that may be used for theiryield strengths and ultimate tensile strength are recommended for use, provided that the rules in thisPart 1.12 are followed.

Table 1 Nominal values of yield strength fyand ultimate tensile strength fufor hot rolledstructural steel

Nominal thickness of the element tmmt50 mm 50 mm


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and in detailing to avoid notches and other stress concentrations. The global analysis should considerimposed deformations where relevant.

5.4.1(3) Additional rule:

Not applicable to steels with grades greater than S460 up to S700.

5.4.1(4)B Additional rule:

Not applicable to steels with grades greater than S460 up to S700.


For steels of grades greater than S460 up to S700, the global analysis using non-linear plastic analysisconsidering partial plastification of members in plastic zones only, applies.

NOTE: The National Annex may specify additional rules for steels according to Tables 1 and 2. Rules fordesign with FEM are given in Informative Annex C of EN 1993-1-5.


For steels with grades greater than S460 up to S700 the design resistance of a net section should be takenas

12,

9,0

M

unetRdt

fAN

= (6.7a)

where M12is the partial factor for net section resistance for steels with grades greater thanS460 up to S700.

NOTE: The National Annex may specify the value of M12. The value M12= M2= 1,25 is recommended.

6.2.3(3) Additional rules:

Steels with grades greater than S460 up to S700 should not be used for applications where capacity designis required.

Table 6.2Additional rule:

The rules for S 460 also apply for steels with grades greater than S460 up to S700.


The standard is applicable to steels with grades greater than S460 up to S700 without further additionalrules.




EN 1993-1-4 is not applicable.

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Annex B is not applicable to steels with grades greater than S460 up to S700.




1.1(1) Additional rules:

EN 1993-1-8 may be applied also to steels with grades greater than S460 up to S700 if the followingadditional rules are applied.

3.6.1(1) For steels with grades greater than S460 up to S700 and bolts loaded in shear in oversize andslotted holes should only be used for category C connections.

3.10.3(2) Not applicable to steels with grades greater than S460 up to S700.

3.10.4Not applicable to steels with grades greater than S460 up to S700.

3.12(2) This clause also applies to connections in steels with grades greater than S460 up to S700.

4.2(2) Additional rule:

For steels with grades greater than S460 up to S700 the filler metal may have lower strength than the basematerial.

NOTEThe National Annex may give restrictions for the use of such undermatched electrodes.

4.5.3.2(6) Additional rule:

For under matched electrodes that are used for steels with grades greater than S460 up to S700 fushouldbe substituted with the ultimate strength of the filler metal feuaccording to Table 3 for electrodesaccording to EN 499, EN 12534 and EN 12535. w should be taken as 1,0.

Table 3 Ultimate strength feuof electrodes

Strength class 35 42 55 62 69Ultimate strengthfeu N/mm2 440 500 640 700 770


The resistance of welded connections with undermatched electrodes with steel grades greater than S460

up to S700 should be based on the strength of the filler metal.

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4.11Additional rule:

For steel grades greater than S460 up to S700 longitudinal fillet welds in lap joints with steel gradesgreater than S460 up to S700 should not be longer than 50aunless the non-uniform stress distribution is

taken into account in the design.5.1.3Not applicable to steels with grades greater than S460 up to S700.

5.1.4Not applicable to steels with grades greater than S460 up to S700.

5.2.2.4Not applicable to steels with grades greater than S460 up to S700.

6Additional rules:

The rules for semi-rigid joints are not applicable for steels with grades greater than S460 up to S700. Ifnon-linear plastic global analysis considering the partial plastification of members in plastic zones is used,

connections between members should only be on the basis of full-strength joints. If elastic globalanalysis is used, connection with partial-strength joints may be used, provided that the resistance of

joints exceeds the design values of the internal forces and moments in the connected elements. Inboth cases the resistance of joints should be determined based on elastic distribution of forces over thecomponents of a joint.

6.2.6.9 to 6.2.6.12Additional rules:

The rules for column bases may only be used for steel grades greater than S460 up to S700, provided thatthe bolt failure mode is decisive for verification of base plates in bending on the tension side ofconnections and an elastic distribution of forces in anchor bolts is used.


For steels with grades greater than S460 up to S700 the reduction factor is 0,8.


8(1) Additional rule:

For hybrid girders made of steel with flange grades greater than S460 up to S700 the limitation1,5fy should be applied, where fyf is the yield strength of the flange.



Table 4 may also be used to determine the maximum permissible element thickness for steel gradesgreater than S460 up to S700.

NOTE 1 Linear interpolation can be used in applying Table 4. Most applications require Ed values between

Ed y0,75 ( )f t = and Ed y0,50 ( )f t = . Ed y0,25 ( )f t = is given for interpolation purposes.Extrapolations beyond the extreme values are not valid.

NOTE 2 For ordering products made of steels according to Table 4 the TJ values should be specified.

NOTE 3 Table 4 has been derived for the guaranteed Charpy energy values CVN in the direction of therolling of the product.

f

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Table 4 Maximum permissible values of element thickness t in mm

Steelgrade

Subgrade Reference temperature TEd[C]CharpyenergyCVN 10 0 -10 -20 -30 -40 -50 10 0 -10 -20 -30 -40 -50 10 0 -10 -20 -30 -40 -50

at T[C]Jmin Ed= 0,75fy(t) Ed= 0,50fy(t) Ed= 0,25fy(t)

EN 10025-6

Q 0 40 55 45 35 30 20 15 15 85 70 60 50 40 35 25 145 125 105 90 80 65 55Q -20 30 65 55 45 35 30 20 15 105 85 70 60 50 40 35 170 145 125 105 90 80 65

QL -20 40 80 65 55 45 35 30 20 125 105 85 70 60 50 40 195 170 145 125 105 90 80QL -40 30 100 80 65 55 45 35 30 145125105 85 70 60 50 200 195 170 145 125105 90

QL1 -40 40 120 100 80 65 55 45 35 170145125105 85 70 60 200 200 195 170 145125105

S500

QL1 -60 30 140 120 100 80 65 55 45 200170145125105 85 70 205 200 200 195 170145125Q 0 40 50 40 30 25 20 15 10 80 65 55 45 35 30 25 140 120 100 85 75 60 50Q -20 30 60 50 40 30 25 20 15 95 80 65 55 45 35 30 160 140 120 100 85 75 60

QL -20 40 75 60 50 40 30 25 20 115 95 80 65 55 45 35 185 160 140 120 100 85 75

QL -40 30 90 75 60 50 40 30 25 135 115 95 80 65 55 45 200 185 160 140 120 100 85QL1 -40 40 110 90 75 60 50 40 30 160135115 95 80 65 55 200 200 185 160 140120100

S550

QL1 -60 30 130 110 90 75 60 50 40 185160135115 95 80 65 200 200 200 185 160140120Q 0 40 45 35 25 20 15 15 10 70 60 50 40 30 25 20 130 110 95 80 65 55 45Q -20 30 55 45 35 25 20 15 15 85 70 60 50 40 30 25 150 130 110 95 80 65 55

QL -20 40 65 55 45 35 25 20 15 105 85 70 60 50 40 30 175 150 130 110 95 80 65QL -40 30 80 65 55 45 35 25 20 125 105 85 70 60 50 40 200 175 150 130 110 95 80

QL1 -40 40 100 80 65 55 45 35 25 145125105 85 70 60 50 200 200 175 150 130110 95

S620

QL1 -60 30 120 100 80 65 55 45 35 170145125105 85 70 60 200 200 200 175 150130110Q 0 40 40 30 25 20 15 10 10 65 55 45 35 30 20 20 120 100 85 75 60 50 45Q -20 30 50 40 30 25 20 15 10 80 65 55 45 35 30 20 140 120 100 85 75 60 50

QL -20 40 60 50 40 30 25 20 15 95 80 65 55 45 35 30 165 140 120 100 85 75 60

QL -40 30 75 60 50 40 30 25 20 115 95 80 65 55 45 35 190 165 140 120 100 85 75QL1 -40 40 90 75 60 50 40 30 25 135 115 95 80 65 55 45 200 190 165 140 120 100 85

S690

QL1 -60 30 110 90 75 60 50 40 30 160135115 95 80 65 55 200 200 190 165 140120100EN 10149-2

S500 MC -20 40 80 65 55 45 35 30 20 125 105 85 70 60 50 40 195 170 145 125 105 90 80S550 MC -20 40 75 60 50 40 30 25 20 115 95 80 65 55 45 35 185 160 140 120 100 85 75S600 MC -20 40 70 55 45 35 30 20 15 105 90 75 60 50 40 35 180 155 130 110 95 80 70S650 MC -20 40 65 50 40 30 25 20 15 100 85 70 55 45 35 30 170 145 125 105 90 75 65S700 MC -20 40 60 45 35 30 25 20 15 95 80 65 50 45 35 30 165 140 120 100 85 70 60



3 Additional rules to application parts EN 1993-2 to EN 1993-6

(1) The design rules in the application parts EN 1993-2 to EN 1993-6 can also be applied to steels withgrades greater than S460 up to S700.

NOTE The National Annex to this Part may limit the range of applicable grades of steel for EN 1993-2 toEN1993-6.

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steel structures design to eurocode

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